Flush more buffers when getting etag
Flush more buffers when getting etag

credativUK/vdirsyncer,tribut/vdirsyncer,tribut/vdirsyncer,credativUK/vdirsyncer,untitaker/vdirsyncer,untitaker/vdirsyncer,hobarrera/vdirsyncer,hobarrera/vdirsyncer,mathstuf/vdirsyncer,mathstuf/vdirsyncer,untitaker/vdirsyncer